feat(ensapi): set active servers for openapi (#1529)

Author: notrab

.changeset/update-openapi-servers.md

@@ -0,0 +1,10 @@
+---
+"ensapi": patch
+---
+
+Add production and testnet servers to OpenAPI spec
+
+The OpenAPI specification now includes the following servers:
+- https://api.alpha.ensnode.io (ENSNode Alpha - Mainnet)
+- https://api.alpha-sepolia.ensnode.io (ENSNode Alpha - Sepolia Testnet)
+- localhost (Local Development)

apps/ensapi/src/index.ts

@@ -79,7 +79,14 @@ app.get(
         description:
           "APIs for ENS resolution, navigating the ENS nameforest, and metadata about an ENSNode",
       },
-      servers: [{ url: `http://localhost:${config.port}`, description: "Local Development" }],
+      servers: [
+        { url: "https://api.alpha.ensnode.io", description: "ENSNode Alpha (Mainnet)" },
+        {
+          url: "https://api.alpha-sepolia.ensnode.io",
+          description: "ENSNode Alpha (Sepolia Testnet)",
+        },
+        { url: `http://localhost:${config.port}`, description: "Local Development" },
+      ],
       tags: [
         {
           name: "Resolution",